A) According to the Social Security Administration, you can ask them to withhold your federal taxes from your Social Security benefit payment when you first apply. If you are already receiving benefits or if you want to change or stop your withholding, you’ll need a Form W-4V from the Internal Revenue Service (IRS). You can download the form or call the IRS toll-free at 1-800-829-3676 and ask for Form W-4V, Voluntary Withholding Request. (If you are deaf or hard of hearing, call the IRS TTY number, 1-800-829-4059.) When you complete the form, you will need to select the percentage of your monthly benefit amount you want withheld. You can have 7, 10, 12 or 22 percent of your monthly benefit withheld for taxes. Only these percentages can be withheld. Flat dollar amounts are not accepted. Sign the form and return it to your local Social Security office by mail or in person.